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【判断题】
敬礼立正、两脚并拢，姿势端正（）A.
正确
B.
错误
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参考解析：
知识点：
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【单选题】When scientists first warned in the 1970s that CFCs could attack ozone, the U.S. responded by banning their use in spray cans. But the rest of the world continued to use CFC - based aerosol cans, and ...
A.
Because the CFCs directly damage the people’s health.
B.
Because the CFCs are poisonous chemicals.
C.
Because the production of the CFCs costs a lot.
D.
Because the CFCs can attack ozone by liberating atoms of chlorine.
【单选题】Scientists first______the idea of the atomic bomb in the 1930s.
A.
competed
B.
conceived
C.
consumed
D.
concealed
【单选题】Scientists first ______ the idea of the atomic bomb in the 1930s.
A.
perceived
B.
conceived
C.
deceived
D.
retrieved
【单选题】下述骨盆狭窄的描述,不正确的是
A.
骶耻外径<18cm:骨盆入口平面狭窄< /div>
B.
坐骨棘间径9cm:骨盆出口平面狭窄
C.
中骨盆和出口平面狭窄:漏斗骨盆
D.
骨盆失去正常形态和对称性:畸形骨盆
E.
骨盆各径线均小于正常值2cm或以上:均小骨盆
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