双吸泵密封环安装在()。
A、叶轮左侧
B、叶轮右侧
C、轴套上
D、叶轮两侧
参考答案:D
情景交际。
1. 见面打招呼应该说:[ ]
a. Hello.
b. Bye.
2. 和别人告别时说:[ ]
3. 告诉别人你的名字是什么时用英语说:[ ]
a. I'm…
b. Goodbye.
Wen Jiabao told the orphans in Wenchuan Earthquake not to cry.His words ____not
have calmed them instantly,but his concern about common people was obviously seen.
A.can
B.must
C.may
D.should