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【单选题】
设光栅平面、透镜均与屏幕平行.则当入射的平行单色光从垂直于光栅平面入射变为斜入射时,能观察到的光谱线的最高级次kA.
变小．
B.
变大．
C.
不变．
D.
无法确定．
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举一反三
【简答题】Neither of the young men who had applied for a position in the university _______. A) has been accepted B) have been accepted C) was accepted D) were accepted
【单选题】Neither of the young men who had applied for a position in the university ______.
A.
has accepted
B.
have been accepted
C.
was accepted
D.
were accepted
【单选题】BP debate involves four independent teams: two teams who argue for the topic are known as the _____ teams, and the other two who argue against it are known as the _____ teams.
A.
Opposition, Proposition
B.
Proposition, Opposition
C.
Upper, Lower
【单选题】In “FLTRP Cup” English Debating Competition, there are four teams on the stage, with two debaters on each team.
A.
TRUE
B.
FALSE
【判断题】班级活动是指在教育者的组织和领导下，为实现教育方针和培养目标，完成学习的教育工作计划，组织班集体成员参加的一系列活动，即以班级为单位的一切活动。()
A.
正确
B.
错误
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