题目

将细胞内、外环境分隔开，控制物质进出的是（ ） A . 细胞质 B . 细胞膜 C . 细胞壁 D . 细胞核 答案：B 阅读理解 　　Mrs．Smith’s husband went off on a business trip to Australia．He wanted to catch the 3∶30 plane to Darwin．She was very surprised when he telephoned her at 5 o’clock and said that he was still at the airport． 　　“What happened?” asked Mrs．Smith． 　　“Well,” said Mr．Smith, “everything was going fine．I got my ticket, checked my luggage and waited in line at the gate．I walked across the runway to the airplane and I saw my friend Jack Scott．Jack was an airplane engineer．I shouted to him and a policeman caught me．” 　　“Why did he catch you?” 　　“I don’t know,” said Mr．Smith．“All I said was ‘Hi, Jack’!” 　　The word “hijack” means “to take control of a plane by force(劫机)”． (1) Why did Mr．Smith want to fly to Australia? Because ________． [　　] A． he was an Australian businessman B． he was leaving for Australia on business C． his wife wanted him to D． he wanted to see his wife (2) When was Mr．Smith caught by a policeman? [　　] A． 3∶30． B． 5∶00． C． When he reached Australia． D． When he would got on the plane． (3) Mr．Smith couldn’t get on the plane because ________． [　　] A． he met with his friend Jack B． he didn’t get the ticket C． there was something wrong with the airplane engine D． he was stopped by a policeman (4) Which of the following is NOT true? [　　] A． The police didn’t know Mr．Smith was Jack Scott’s friend．? B． Jack Scott worked as an airplane engineer． C． The policeman misunderstood Mr．Smith． D． Mr．Smith knew why the policeman caught him． (5) Why was Mr．Smith caught by the policeman? Because ________． [　　] A． he didn’t keep silence at the airport B． he greeted an airport engineer named Jack C． the pronunciation of “Hi, Jack” has another frightful meaning D． the police didn’t know English