题目:
词汇(每空1分,共20分)
小题1:Can you look after (你自己) well?
小题2:—Is there anything interesting in today's newspaper? No,_________(没有东西)。
小题3:There aren't enough oranges here. We need________(更多的)oranges.
小题4:My cousin is__________(诚实的 )。He never tells lies.
小题5:She is a ________ girl. She often does her homework very ______ . (care)
小题6:You can't take these____________(杂志)out of the reading room.
小题7:Is there anything___________(特别的)in the box?
小题8:Don't___________(相信)her. She is always telling a lie.
小题9:Millie is ready_________(help)others. She is very________(help).
小题10:Mum, I'm still hungry. Can I have one________(many)piece of bread?
小题11:All the teachers and students here are very_________(friend).I'm happy at school.
小题12:Mr Wu often tells us__________(fun)stories and makes us________(laugh).
小题13:We should (信任) our best friends, because they never tell lies.
小题14:I never feel _______ (bore)with him, and we are all friendly to him .
小题15:They ____________(have) an English class at this time yesterday.
小题16:If he __________(arrive) at Beijing Zoo at noon, he will see the feeding of animals.
小题17:The Chang Jiang River is one of _______ (long) rivers in the world.
答案:
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答案:C题目分析:根据左手定则可得: 电子束受到垂直纸面向里的洛伦兹力,要使粒子不偏转,粒子必须受到垂直纸面向外的电场力, 所以有,所以,因为负电荷受到的电场力方向与电场方向相反,所以电场方向垂直纸...