LED灯是一种新型的高效节能光源,它的核心元件是发光二极管。二极管由下列哪种材料制成 [ ]
A.陶瓷材料
B.金属材料
C.半导体材料
D.超导材料
C
This is Jim. He is thirteen. He is from the U.S.A. He is a student. He has a good friend. His name is Jack. Jack is fifteen. He is from Canada. Jack is tall, but Jim is short. They are in the same school, but they are in different grades. Jim is in Class Two. Jack is in Class Two, too. They go to school(上学)at seven in the morning and go home(回家)at six in the afternoon.
根据短文内容,选择正确答案。(5分)
小题1:Jim and Jack are ______.
小题1:
A. brothers B. friends C. teacher and student D. from the U.S. A.
小题2:Jim and Jack are in _____.
小题2:
A.the same grade
B.different grades
C.the same color
D.the same class小题3:Jack is in _____.
小题3:
A.Class 4
B.Class 3
C.Class 2
D.Class 1小题4:They go to school at ______ in the morning.
小题4:
A.6:00
B.7:00
C.7:30
D.8:00小题5:Jim is ______.
小题5:
A.short
B.tall
C.strong
D.Big
律师应对发行人是否符合股票发行上市条件,发行人的行为是否违法、违规,招股说明书及其摘要引用的法律意见书和律师工作报告的内容是否适当,明确发表总体结论性意见。律师发表意见可分为( )。
A.肯定性意见
B.否定性意见
C.保留意见
D.拒绝表示意见t