更多"The reason why the laser beam is ve"的相关试题:
[单项选择]The reason why the laser beam is very strong is that ______.
A. it is artificially illuminated (照亮)
B. it is made up of a concentrated beam of light
C. it sends out heat in all directions
D. its heat is increased by the heat of the sun
[单项选择]After the use of the laser beam, surgeons can perform operations which ______.
A. leave the patients with negative effects
B. can. treat only human eye disease
C. do little damage to the patients themselves
D. make the patients need a long time to recover
[单项选择]A laser beam is used to ______even the hardest substance.
A. light up
B. repair
C. identify
D. penetrate
[单项选择]A Laser beam can be turned into a ______ weapon.
A. deadly
B. dead
C. deadthly
D. deadening
[单项选择]A laser beam can be turned into a ______ weapon.
A. dead
B. deathly
C. dying
D. deadly
[单项选择]The beam that is ______by a laser differs in several ways from the light that comes out of a flashlight.
A. emitted
B. transported
C. motivated
D. translated
[单项选择]Why was the boy very pleased
A. Because he got a mirror.
B. Because he saw himself.
C. Because he found himself good-looking.
[单项选择]He is （） student that he performed very well in the nationwide examinations.
A. so diligent
B. such a diligent
C. so much diligent
D. such very diligent
[单项选择]According to the passage, why does water travel through plants in unbroken columns
A. Root pressure moves the water very rapidly.
B. The attraction between water molecules is strong.
C. The living cell of plants push the water molecules together
D. Atmospheric pressure supports the columns.
[单项选择]______is considered to be the very beginning of the American War of Independence.
A. Lexington Gunshot
B. Boston Tea Party
C. The Stamp Act
D. The Gunpowder Plot
[单项选择]The conquerors tried to ______ the very name of the people's national hero from their memories.
A. raze
B. ruin
C. demolish
D. wreck
