在一次竞猜活动中，设有5关，如果连续通过2关就算闯关成功，小王过每关的概率都为1/2，则小王闯关成功的概率为()．
A. 1/8
B. 1/4
C. 3/8
D. 4/8
E. 19/32
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Raise a fainting person's feet if his face______.
A. looks pale
B. shows shock
C. feels hot
D. looks red
某人向同一目标独立重复射击，每次射击命中目标的概率为p(0＜p＜1)，则此人第4次射击恰好第2次命中目标的概率为()．
A. 3p(0＜p＜1)2
B. 6p(0＜p＜1)2
C. 3p2(0＜P＜1)2
D. 6p2(0＜p＜1)2
Which of the following can best summarize the third paragraph？
A. The company concerned should drop clients off within snorkeling distance of a whale.
B. Engine noise from a maneuvering boat can startle a whale.
C. Whales will change their habits if a person keeps bothering them.
D. All possible harms to whales.
The famous nitro boosts are added to the engine so that______ .
A. drivers can beat other racers in speed
B. it is smoother to start the car
C. the car can climb the steep slope easily
D. the car can cover a longer distance
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