口算。25×2=800×7=22×3=14×5=43×2=12×4=21×4=6_爱下问搜题

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问题口算题

口算。

25×2=	800×7=	22×3=	14×5=	43×2=
12×4=	21×4=	60×8=	17×2=	51×3=

答案

50；5600；66；70；86；48；84；480；34；153

选择题

—I will have an important test tomorrow. I feel stressed now.

—__________ and believe youself. You will pass it.

A．I’m sorry to hear that

B．Sure, I’d love to

C．Ok.

D．Take it easy.

多项选择题

防烟系统的构成包括（）。

A.挡烟垂壁

B.风口

C.排烟窗

D.风机

E.风道