As long as we have been on earth, we have used
the sea around us. We take from the ocean and we give (41)
it.
We take fish from the ocean — millions of
kilograms of fish, every year, to (42) millions of people. We
even use (43) bones for fertilizer and meal.
We take (44) from the ocean. One way to get salt
(45) sea water in a shallow basin and leave it (46)
it evaporates. Along with salt, other minerals are left after
evaporation — iodine (碘), magnesium(镁), and bromine(溴), to (47)
a few.
Much gold and silver drift (48)
in the waters of the sea, too. But the sea does not (49)
them up by simple evaporation.
Other gifts from the
sea are pearls, sponges(海绵), and seaweed. Pearls become jewelry. (50)
sponges become cleaning aids. Seaweed becomes (51) of many
kinds —
A. in
B. up
C. to
D. for
[单项选择]{{B}}Text 2{{/B}}
You must have been troubled by when to
say "I love you" because it is one of the greatest puzzles in our
life.
What if you say it first and your partner doesn’t love you
back’ Or if they do say it but you don’t feel they mean it Being the first to
declare your love can be nerve-racking(紧张) and risky and can leave you feeling
as vulnerable as a turtle with no shell. But is the person who says it first re-
ally in a position of weakness Doesn’t it pay to hold back, play it cool and
wait until the other half has shown their hand first
"A really
good relationship should be about being fair and being equal," says psychologist
Sidney Crown. "But love is seldom equal." All relationships go through power
struggles but, he says, if a love imbalance continues for years, the rot will
set in. "That feeling of ’I’ve always loved
A. The importance of "I love you".
B. The meaning of "I love you".
C. The time of saying ."I love you".
D. The place of saying "I love you".
[单项选择]Since 1939, numerous studies have been conducted to determine whether smoking is a health hazard. The trend of the evidence has been consistent and indicates that there is a serious health risk. Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy.
Cigarette smoking is believed by most research workers in this field to be an important factorin the development of caner of the lungs and cancer of the throat and is believed to be related to cancer of some other organs of the body. Male cigarette smokers have a higher death rate from bean disease than non--smoking males. Female smokers are thought to be less affected because they do not breathe in the smoke so deeply.
Apart from statistics, it might be helpful to look at what smoking tobacco does to the human body. Smoke is a mixture of gases, vaporized chemicals, minute particles of ash and other solids. There is also nicotine, which is po
A. Smoking is big hazard to health.
B. There are ways to make smoking safe.
C. Smoking is more hazardous to male smokers than to female smokers.
D. There are many poisonous chemicals in tobacco.
[多项选择]
Calories
For years now, calories have
been all the rage—people are counting them and cutting them, and you’d be
hard-pressed to find something at the supermarket that does not list its
calories per serving somewhere on the package. But have you ever wondered what
exactly a calorie is
What Is a Calorie
A calorie is
a unit of energy. We tend to associate calories with food, but they apply to
anything containing energy. For example, a gallon (about 4 liters) of gasoline
contains about 31,000,000 calories.
Specifically, a calorie is
the amount of energy, or heat, it takes to raise the temperature of 1 gram of
water 1 degree Celsius (1.8 degrees Fahrenheit). One calorie is equal to 4.184
joules (焦耳), a common unit of energy used in the physical sciences.
Most of us think of calories in relation to food, as in "This can of soda
has 200 calories." It turns out that the calories on a food
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