解方程：（1）（x-1）2-4=0（2）y（y+1）=3

读下面的对话，并作对话后面的选择题。

Waiter: May I help you?

Frank: Yes, please. I'd like some a hamburger and a glass of milk.

Waiter: Sorry. We don't have any. Our restaurant is a Chinese restaurant.

           We only have Chinese food. We have dumplings, rice, noodles, fish,

            and vegetables. Dumplings are delicious. Would you like some dumplings?

Frank: How much for one jin?

Waiter: Ten yuan.

Frank: OK. I'll have one jin.

Waiter: It's too much.

Frank: Then I'll have a half. What would you like, Jack?

Jack: I'd like rice and fish.

1. What do they have in the restaurant? They have _____.

A. donuts and hot dogs

B. hamburgers and French fries

C. rice and dumplings

D. milk and vegetables

2. Frank wants to eat _____.

A. a sandwich and a glass of milk

B. a hamburger and a glass of milk

C. noodles and dumplings

D. vegetables and rice

合同法的最基本原则是( )

A．合法原则

B．诚实信用原则

C．鼓励交易原则

D．合同自愿原则

念珠菌性 * * 炎的病因是（）。

A.多见于孕妇、糖尿病妇女

B.接受大量雌激素治疗者

C.长期应用广谱抗生素者

D.长期应用肾上腺皮质激素者

E. * * 酸性降低者

如图所示的真空辐射炉，球心处有一黑体加热元件，试指出①，②，③3处中何处定向辐射强度最大？何处辐射热流最大？假设①，②，②处对球心所张立体角相同。