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单选题

在下列叙述中正确的是()

A
频率不同的光一定不能相互干涉
B
频率不同的光一定能够相互干涉
C
频率相同的光一定不能相互干涉
D
频率相同的光一定能够相互干涉

题目答案

A

答案解析

暂无解析
举一反三
单选题

Mrs.Weinsteinbravelyandpersistentlyusedeveryskillandpowershehadtoherattackertosimplytakehercarandnotherlife.

A
trust
B
credit
C
convince
D
believe

题目答案

C

答案解析

暂无解析
单选题

Agoodworkerinakeyspotcould,hekeptupproduction,takeallthecoffeebreakshewanted,andthebosseswouldverylikelylooktheotherway.

A
aslongas
B
asthough
C
assoonas
D
asif

题目答案

A

答案解析

暂无解析
单选题

InAugust1977,asatellitetogatherdataaboutthe10millionblackholeswhicharethoughttobeintheMilkyWay.

A
launched
B
waslaunched
C
hasbeenlaunched
D
islaunched

题目答案

B

答案解析

暂无解析