37m泵车液车执行元件有()。
A、20个油缸;
B、18个油缸;
C、4个马达;
D、3个马达
参考答案:A, C
用0、5、6组成的三位数能同时被2、5整除,则最小的三位数是______.
Lily had a bad stomachache. But the doctor said there was ____________with her.
A.new nothing
B.serious somthing
C.everything serious
D.nothing serious