热态启动时,润滑油温应()℃。
A.<40;
B.40~45;
C.>45;
D.>50。
参考答案:B
There are many trees on _______ side of the road and _______ sides of the river.
A. both, both B. either, either C. either, both
短效β2受体激动剂为()
A.异丙托溴铵
B.沙丁胺醇
C.沙美特罗
D.噻托溴铵
E.福莫特罗