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【简答题】
空心阴极灯是一种()光源，它的发射光源具有()特点。当灯电流升高时，由于自吸和多普勒效应的影响，导致谱线轮廓变宽，测量灵敏度()，工作曲线变弯，灯寿命()。
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举一反三
【单选题】He had a sport jacket and jeans on, and no tie
A.
was dressed very ________for the interview.
B.
casually
C.
come across
D.
fill out
E.
gave … a … look
F.
in....thirties
G.
couldn’t help
H.
short for
I.
open to
J.
let out K. all about his age
【单选题】He often has ____ for breakfast.
A.
two breads
B.
two piece of breads
C.
two pieces of bread
D.
two pieces of breads
【简答题】He likes English,____?
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