胰岛素是治疗糖尿病的良药，现在科学家将控制胰岛素合成的基因转到能快速繁殖的大肠杆菌内，可获的更多的胰岛素，这种技术属于(   )

在制作口腔上皮细胞临时装片时，将标本放于    中（ ）

阅读表达。阅读下面的短文，根据短文内容回答问题。

    Mr. King was the owner of a large company. One day, he went into his office early in the morning to get ready to go to the airport and left for another city.

    He was leaving his office when Bill, a night watchman, came in. Bill just came off work(下班). After saying "Good morning" to Mr. King, Bill told the owner about his bad dream. Last night he dreamed Mr. King's plane crashed after it took off. Mr. King was surprised to hear this. He decided to go by train.

    Bill's dream came true. That morning the plane really crashed just after it took off. Later Mr. King returned to his office and heard the accident. To express (表达) his thanks, Mr. King gave Bill $5,000. He also gave Bill a letter. Mr. King told Bill that a man like him should be sent away. Bill was surprised and asked, "Why?" Mr. King said, "Go home and read the letter, and you will know why."

    Bill went home and opened the letter in a hurry. After he read it, he became sad. In the letter there was only one sentence — "A night watchman can't sleep on his duty(值班), but you did."

(Answer the following questions with no more than 6 words.)

某生物兴趣小组为探究“影响甘薯（俗称地瓜）生长发育的环境因素”，做了如下实验：

a．取一样大小的4个花盆，分别装入同种等量的土壤，并编号．

b．将4颗同品种、生长状况相同的带芽甘薯分别钟入4个花盆中．

c．再将4个花盆分别放在不同的环境中（见表），并观察记录甘薯的生长状况．

请回答下列问题：