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【简答题】
将3名男生和4名女生排成一行，甲、必须站在两头，则不同的排列方法共有 种。（用数字作答）
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: Sit down please, Mr. Johnson. M: Nice to meet you, ma'am. W: I have read your letter here. You seem to have done very well in school. Can you tell me something about your schoolwork? M: As you...
A.
history
B.
geography
C.
mathematics
D.
art
【简答题】长期阴雨天，农田积水，若不及时排水，淹水的旱生作物就会很快死亡，是由于植物根的______作用无法进行的缘故；放置时间长的萝卜会空心，就是由于萝卜的呼吸作用分解了大量的______的缘故。
【单选题】听力原文：W: Sit down please, Mr. Johnson. M: Thank you. W: I have read your application letter here. You seem to have done very well in school. Can you tell me something about your schoolwork? M: As you c...
A.
Talking with his teacher about his schoolwork.
B.
Preparing software.
C.
Talking to an interviewer.
D.
Writing programs.
【单选题】如果植物体长期淹水也会死亡，主要原因是
A.
过多的水分造成温度降低，影响根的呼吸
B.
过多的水分会造成根部缺氧，使根部的呼吸受阻
C.
水分促进细胞的大量繁殖，导致根部腐烂
D.
根毛吸收水分过多，肥料相对减少，营养供应失调
【多选题】汇编语言相对于C语言对8051进行编程时的缺点有( )。
A.
与CPU硬件结构紧密相关，CPU不同汇编也就不同
B.
汇编语言不能良好移植
C.
用汇编语言进行编程要必须了解CPU的结构与性能
D.
汇编语言的执行效率较差
【单选题】In fact Mrs. Smith ______what the man had said.
A.
understood
B.
was puzzled about
C.
was glad to hear
D.
didn’t understand
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