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【判断题】
核质体是真核生物所特有的、无核膜结构的、原始形态的细胞“核”。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】As the inlet ports are opened by the downward moving piston, the scavenging air enters and displaces the remaining exhaust gas in preparation for ________.
A.
the combustion
B.
burning
C.
the next cycle
D.
the injection
【单选题】Directives moving downward from superiors to subordinates usually follow the indirect pattern. ( )
A.
True
B.
False
【简答题】简述携带者检出的意义及主要方法
【单选题】The price elasticity of demand ________ in value when moving downward along a ________ line demand curve.
A.
falls; straight
B.
rises; curved
C.
falls, curved
D.
rises; straight
【单选题】An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the cable must be
A.
greater than the weight of the elevator.
B.
less than than the weight of the elevator.
C.
equal to the weight of the elevator.
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