2.(2005年·常州市)天地万物,五光十色.关于光,下列说法错误的是 ( )
A.太阳光是由多种色光组成的 B.可通过三棱镜使太阳光发生色散
C.光是一种电磁波 D.白光是单色的光
1.小明学了光的色散之后,小明想回家再做一下这个实验,但家里没有三棱镜,下列器材可代替三棱镜的是 ( )
A.玻璃砖 B.一盆水和平面镜 C.凹面镜 D.凸面镜
15、---- I go back before lunch?
----No,I don’t think you .
A、Need;must B、Do;need to C、Must;have to D、May;ought to
1-----5ADCAB 6----10CDCBA 11---15ABBCC
14、----Why didn’t come to my party?I was so disappointed at your absence.
----I’m very sorry.I but I had a visitor at the last minute.
A、would like have B、would like to C、would like to have D、would like
13、Johnny,you play with the knife,you hurt youtself.
A、won’t;can’t B、mustn’t;may C、shouldn’t;must D、can’t;shouldn’t
12、The taxi only hold six passengers.It is full.You take the next one.
A、may;may B、can;may C、may;can D、must;can
11、I wish to go home now, I?
A、may B、can’t C、must D、do
10、Sorry,I’m late.I have turned off the alarm clock and gone back to sleep again.
A、might B、should C、can D、will
9、----He seems to be a student.
----No,he .
A、used to B、used to be C、used to have D、used to have been
8、----Were you shown around Venice in a boat with those American tourists?
----No,but I wish I .
A、am B、were C、had D、should