更多"Since （ ）, computer technology has "的相关试题:
[简答题]It has been more than 30 years since man first landed on the moon. Some people think that space research is a waste of money. Discuss.
You should write no less than 250 words. Write your article on ANSWER SHEET 2.
[简答题]It has been more than six months since we had the opportunity to serve your car, and we’ve missed you. So, we are inviting you to bring your car into our shop for a free inspection and adjustment. We hope that you will accept our offer. We have set aside the hours between 8:00 a. m. and 1:O0 p. m. , Monday through Friday for your convenience.
[单项选择]Since the island soil has been barren for so many years, the natives must now______much of their food.
A. deliver
B. import
C. produce
D. develop
[单项选择]Since everything has been settled, I have nothing ______ to say.
A. any most
B. less
C. further
D. enough
[单项选择]Since 1975 there has been in the United States a dramatic decline in the incidence of traditional childhood diseases such as measles. This decline has been accompanied by an increased incidence of Peterson’s disease, a hitherto rare viral infection, among children. Few adults, however, have been affected by the disease.
Which of the following, if true, would best help to explain the increased incidence of Peterson’s disease among children ？（）
A. Hereditary factors determine in part the degree to which a person is susceptible to the virus that causes Peterson’s disease.
B. The decrease in traditional childhood diseases and the accompanying increase in Peterson’s disease have not been found in any other country.
C. Children who contract measles develop an immunity to the virus that causes Peterson’s disease.
D. Persons who did not contract measles in childhood might contract measles in adulthood, in which case the consequences of the disease would generally be more severe.
E. Those who have contracted Peterson’s disease are at increased risk of contracting chicken pox.
[填空题]Electronic Waste
It has been known since ancient times that certain plants regularly open
their leaves in daytime and close them at night. It was assumed which this 62. ______
periodic change was triggered by the alternating sunlight and darkness. Such
leaves stick to their daily routine even when keeping in constant darkness. 63. ______
What is circadian rhythm Many biological processes follow a 24-hours 64. ______
schedule. These cycles are called circadian rhythms. These innate rhythms are
governed by sophisticated chemical mechanisms can be described as biological 65. ______
clocks. Such rhythms are important for humans too! We sleep through most
of the hours of darkness and are awaken through most of the hours of 66. ______
daylight. Body temperature increases during the day and decreases during the
night. The secretion of various hormones that controls life’s processes rises 67. __
[单项选择]Passage Three
It has been two decades since the fate of a bashful bird that most people had never seen came to symbolize the bitter divide over whether to save or saw down the ancient forests of the Pacific Northwest. Yet it was not until Thursday that the federal government offered its final plan to prevent the bird, the northern spotted owl, from going extinct.
After repeated revisions, constant court fights and shifting science, the Fish and Wildlife Service presented a plan that addresses a range of threats to the owl, including some that few imagined when it was listed as a threatened species in 1990.
The newer threats include climate change and the arrival of a formidable feathered competitor, the barred owl, in the soaring old-growth evergreens of Washington, Oregon and California where spotted owls nest and hunt.
One experiment included in the plan: shooting hundreds of barred owls to see whether that helps spotted owls recover.
Even after all these yea
A. the new mapping of habitat in the protection for owls is slow to complete
B. the new mapping of habitat for owls will extend beyond presently set areas
C. the revised Northwest Forest Plan under President Obama is maintained
D. President Bush revised Northwest Forest Plan and allowed more logging
