机动泵和手动泵在与水平面成（）的倾斜面上应能正常工作，无异常现象。
A.20°
B.30°
C.40°
D.50°
参考答案：B
His idea of having weekly family meals together, which seemed difficult at first, has _____ many good
changes in their lives. [ ]
A. got through
B. resulted from
C. turned into
D. brought about
TD-LTE目前在中国以外的其他国家还没有正式商用。（）
A.正确
B.错误
