几丁质是许多真菌细胞壁的重要成分，几丁质酶可催化几丁质水解．通过基因工程将几丁质酶基因转入植物体内，可增强其抗真菌病的能力．回答下列问题：

为了参加社区“畅响G20”文艺演出，某校组建了46人的合唱队和30人的舞蹈队，现根据演出需要，从舞蹈队中抽调了部分同学参加合唱队，使合唱队的人数恰好是舞蹈队人数的3倍，设从舞蹈队中抽调了x人参加合唱队，可得正确的方程是（　　）

语法填空

Hotel Clerk: Hi, can I help you?

Man : Yes. I'd like a room ____ the night, please. The sign outside says you have vacancies(空房)

Hotel Clerk: Yes, ____ only a couple. I guess nobody wants to drive in such ____ (storm) weather.

Man : I surely don't. How much are the rooms?

Hotel Clerk:  They are ﹩50 a ____.

Man : That's fine.

Hotel Clerk: I can give you Room 14. It is right beside the coffee shop. I just need you ____ (sign) the register.

Man : There you go. I am ____ (awful)hungry, Is the coffee shop still open?

Hotel Clerk: Yes, it is ____ until nine o'clock. If you want anything after that, there are a couple of machines ____ (sell) soft drinks, chocolate bars, and so on.

Man : Thank you. By ____ way, is there a television in the room?

Hotel Clerk:Yes, we've got cable(光缆) TV.

Man : Oh, that's great.

Hotel Clerk:Well, here is your key. ____ you need anything else, please call me.

Man : Ok. Thanks again.