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【单选题】
截切圆锥时,截平面过圆锥锥顶,截交线的形状是A.
等腰三角形
B.
圆
C.
椭圆
D.
双曲线
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皮皮学刷刷变学霸
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【简答题】When a call ,what are the ways to sound as good as you really are ?
【单选题】He must be helping the old man to water the flowers, _____? [ ]
A.
is he
B.
isn't he
C.
must he
D.
mustn't he
【简答题】when a call what are the "do's"?
【单选题】肺灌注常用显像剂 99mTc-MAA ,其颗粒大小为
A.
99 Tc m -MIBI
B.
99 Tc m -MAA
C.
99 Tc m -DTPA
D.
99 Tc m -HAM
E.
99 Tc m -EC
【简答题】when a call what are the "don't?
【单选题】When making a call, sometimes there will be something wrong with the phone or telephone line. Which of the following expressions is not right when expressing the problems?
A.
I've tried to get through several times but it's always engaged.
B.
Sorry, we were cut off.
C.
The phone is in order.
D.
She has changed her telephone number.
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