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【单选题】
下面哪一种不是冰碛物的特点（ ）。A.
磨圆度高
B.
大小混杂
C.
分选性差
D.
有擦痕
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反馈参考答案：
举一反三
【简答题】显花植物包括( )门、( )门。
【单选题】The elevators provide ______ control around the airplane’s _______ axis.
A.
pitch, lateral
B.
roll, lateral
C.
yaw, vertical
D.
stall, horizontal
【单选题】He came to my class every week, but his attitude ________ that he was not realy interested in the subject.
A.
described
B.
strengthened
C.
suggested
D.
explained
【单选题】Contrary to early expectations his ratings and he soon had an audience of a million.
A.
raised
B.
soared
C.
strengthened
D.
intensified
【单选题】Elevators provide pitch control about the—— axis of the aircraft.
A.
vertical
B.
lateral
C.
longitudinal
【简答题】显花植物包括 门、 门。
【单选题】Elevators provide pitch controlabout the—— axis of the aircraft.
A.
lateral
B.
vertical
C.
longitudinal
【单选题】The elevators provide pitch control around the airplane's ________ axis.
A.
longitudinal
B.
lateral
C.
vertical
D.
periodical
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