【判断题】只要气流的流动速度足够大,风筝就能够起飞。()
【单选题】对数组进行初始化 char carr[ ]={'s','t','u','d','e','n','t'},barr[ ]="student"; 则正确的是( )。
【单选题】If a refrigeration compressor is running continuously without lowering the temperature in the refrigerated space, the trouble may be _____.
A.
a shortage of compressor oil
B.
warm food in the refrigerator
C.
excessive condenser cooling water
D.
a shortage of refrigerant
【简答题】A.finishing B.lowering C.reducing D.declining
【判断题】为了避免气蚀现象,离心泵吸入口附近的压力应该高于操作条件下的液体的饱和蒸气压。