理论上双吸式叶轮的轴向推力（）。A、较大 B、比单吸式叶轮还大_爱下问搜题

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问题单项选择题

理论上双吸式叶轮的轴向推力（）。

A、较大

B、比单吸式叶轮还大

C、等于零

D、较小

答案

参考答案：C

填空题

选词填空。

squirrels, holiday, noodles, pictures, mountain, Wednesday

Dear Kathy,
       The post card shows you a picture about my    1   . On
Monday we went to the    2   , we saw many    3    there. On
Tuesday we ate some    4    for lunch. On    5    I took some
   6 We were very happy!
                                                                         John

1. 2. 3.
4. 5. 6.

选择题

“活到老，学到老”、“学无止境”、“吾生也有涯，而知也无涯”……这些古语启示我们要具有[ ]

A．创新精神

B．终身学习的观念

C．团队精神

D．艰苦奋斗精神