题目

2．(2012·广东理综)培育草莓脱毒苗所采用的主要技术是( ) A．组织培养        B．细胞杂交 C．显微注射                             D．核移植 答案：答案：A 解析：本题主要考查现代生物技术应用的相关知识。由于植物分生组织中病毒很少或没有病毒，常用茎尖通过组织培养技术培育脱毒苗；细胞杂交通常用于培育杂种个体；显微注射技术常用于基因工程，培育转基因生物；核移植技术常用于培养克隆动物。故只有A选项符合题意。 阅读理解 　　“Let’s go Dutch, shall we?” Jim said after a dinner to his friends in a restaurant．What does Jim mean? 　　Long ago, there was a kind of dinner called Dutch treat．At a Dutch treat, the invited guests were expected to pay for their own share of the food and drink．Now, Dutch treat means when friends go out to have fun, each person pays his or her own share． 　　There are many other expressions related with “Dutch” in American English．However, most of them were first used in England in the 17th century．At that time, the British and the Dutch were war enemies．So when British people talked about something wrong or bad, they would like to use the word “Dutch”． 　　A common expression heard a few years ago was in Dutch．A friend may tell you, “You are in Dutch．The teacher is angry with you．Be careful!” When a soldier took Dutch leave, he left the army without permission．Dutch courage was the false courage produced by the effects of drinking wine． 　　There is one expression that did come from the Dutch．That is to talk like a Dutch uncle．The Dutch were known for the strict and serious way they educated their children． (1) What did people mean by saying “Let’s go Dutch”? [　　] A． The guests should leave first． B． Each person should pay his or her own bill． C． The food should be better next time． D． People should go to another restaurant． (2) According to the passage, the British in the 17th century ________． [　　] A． first used the word “Dutch” B． were mistaken for Dutch people C． got along well with the Dutch people D． used the word “Dutch” for something bad (3) If your friend says that he is in Dutch, he most probably means that ________． [　　] A． he is happy B． he is lucky C． he is in trouble D． he is on vacation (4) If someone spoke to you in a very serious way, you may say that he ________． [　　] A． was like a Dutch uncle B． would take a Dutch leave C． had Dutch courage D． had a Dutch treat