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【单选题】
关于垂直感染,下列叙述哪项不正确A.
感染方式是亲代直接传给子代
B.
感染途径是产道或胎盘
C.
可致死胎,早产或先天畸形
D.
是病毒独特的感染方式
E.
以风疹病毒等常见
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反馈参考答案：
举一反三
【判断题】The strength of the gravity is determined by the volume of the object, the greater the volume, the stronger the gravity.
A.
正确
B.
错误
【判断题】4) The strength of the gravity is determined by the volume of the object, the greater the volume, the stronger the gravity.
A.
正确
B.
错误
【单选题】The strength of the component means（ ）。
A.
The ability of materials to resist tension, compression, bending, torsion and shear
B.
The ability of components to maintain their original equilibrium state under external forces
C.
The ability of components to to resist deformation under external forces
D.
The ability of members to resist failure under external forces
【单选题】Which of the following statements is correct ? (1) The strength of the parts indicates the ability of that to resist damage. (2) The stiffness of the parts indicates the ability of that to resist defo...
A.
(1), (2), (3)
B.
(4)
C.
all correct
D.
all errors
【单选题】The kite is limited by the following conditions EXCEPT for______.
A.
the strength of the wind
B.
air traffic conditions
C.
the power requirements of the equipment
D.
the movability of the TRAM
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