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【单选题】
It’s warmer today ,you’d better ____________your thick sweater .:A.
put on
B.
take off
C.
to put on
D.
to take off
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【简答题】当ContentObserver观察到指定Uri代表的数据发生变化时，就会触发ContentObserver的【】方法。
【单选题】In urban planning, it is important to take into consideration the ________ influence between the transportation network and other facilities, for example shopping centers and medical centers.
A.
c onsecutive
B.
denotes
C.
. reciproca
【单选题】In general, _____ is suitable for delivering small quantifies at high pressure.
A.
reciprocating pump
B.
gear pump
C.
centrifugal pump
D.
vane pump
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