俗称的10米业余波段的频率范围以及业余业务和卫星业余业务的使用状态分别为：（）A.2

新生儿硬肿病的病理生理中，不正确的是（）

A.血流较丰富

B.体内能量储存少

C.皮肤面积较大

D.棕色脂肪含量较多

E.体温调节中枢发育不成熟

—I’m afraid that I can’t do it.

—Oh, you should believe in yourself. You won’t know what you can do______ you try it.

A．if

B．because

C．until

D．while

牙尖交错时，下切牙切缘咬在上领切牙颈1/3者称为（）

A．正常覆

B．浅覆

C．I度深覆

D．Ⅱ度深覆

E．Ⅲ度深覆

特种作业人员必须按照国家有关规定经专门的安全作业培训考核，取得特种作业操作资格证书。

Questions 15～18

A. A tour whose price includes tickets, meals and accommodation.
B. A travel arrangement that takes people to more than one place.
C. A trip that covers a distance of more than 50 miles.
D. A tourist group that consists of at least 80 people.