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【判断题】
多组分互相分离是使混合物中所有组份都得到互相分离,全部为纯物质。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】. 下列果菜中属于茄果类的是
A.
黄瓜
B.
西葫芦
C.
落苏
D.
四季豆
E.
：C
F.
4 . 属于竹子地下嫩茎的是
G.
莴笋
H.
茭笋
I.
冬笋
J.
芦笋 K. ：C L. 7 . 因香味过浓，配菜时需谨慎使用的食用菌是
【单选题】Camshafts are usually driven by timing gears or _____.
A.
push rods
B.
chain drives
C.
rocker arms
D.
flywheels
【单选题】The ________ is a metal rod that fits between the lifter and the rocker arm.
A.
timing gear
B.
cam lobe
C.
push rod
D.
rocker arm
【单选题】The ______ is a metal rod that fits between the lifer and the rocker arm.
A.
timing gear
B.
cam lobe
C.
Push rod
D.
Rocker arm
【单选题】The inventor of the rocker chair may not be able to launch the chair into the market because ______.
A.
he hasn't applied for the patent
B.
he himself can't make many chairs
C.
the rocker in the chair is protected by the patent
D.
the rocker chair has not been proved to be safe
【简答题】英译汉: rocker arm
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