申请使用气导航线有意义的航区是() A.沿岸航行或狭水道航行 B.低纬度海域航行 C

题型:单项选择题

问题:

申请使用气导航线有意义的航区是()

A.沿岸航行或狭水道航行

B.低纬度海域航行

C.横跨中高纬大洋航行

D.A.B.C都对

考点:航海学航海气象与海洋学航海气象与海洋学题库
题型:单项选择题

规范操作是实验成功的保证。下列操作正确的是

A.熄灭酒精灯用嘴吹灭

B.木炭还原氧化铜的实验结束时,先熄灭酒精灯

C.实验室用高锰酸钾制氧气,在试管口附近放一团疏松的棉花

D.称取一定量的食盐时,将砝码放在天平的左盘

题型:单项选择题

用所给词完成句子

amazing, reception,  champion, snacks,  fortunately, hot pot,

小题1:I broke my arm playing basketball but ___________ it’s fine now.

小题2:Ben is a __________ tennis player. He has never lost a match.

小题3:Max’s success as a runner is really ___________.

小题4:At the wedding __________, we had a sit-down meal in a big restaurant.  

小题5:In the winter, we love having ___________ at home with friends.

小题6:At our party, there is only soft drink, and there are lots of _______ like biscuits and sandwiches to eat.

题型:单项选择题

怀疑胎儿为粘多糖沉积病,首选试验是()

A.X染色质检查

B.ChE测定

C.甲苯胺蓝定性试验

D.ALP测定

E.γ-GT测定

题型:单项选择题

X=+0110011,Y=-0101001,求[X+Y]=()。

A.10000101

B.00001010

C.10001010

D.10000101

题型:单项选择题

下 * * 组量子数中,不合理的是:

A.n=5,l=4,m=3,ms=+1/2;

B.n=5,l=4,m=2,,ms=-1/2;

C.n=3,l=2,m=-2,ms=+1/2;

D.n=3,l=2,m=0,ms=-1/2;

E.n=5,l=5,m=-2,ms=+1/2

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