死髓牙根尖部牙龈出现瘘管应考虑为A．根尖囊肿B．慢性牙髓炎C．慢性根尖脓肿D．慢性根

阅读理解。

      Peter works in a food shop. He helps the shopkeeper (店主). He puts food on the shelves (架子) every day.

Then people come into the shop and buy the food. Today there aren't any bags of rice on the shelf. "Peter," says

the shopkeeper. "We need some bags of rice. Bring some rice to the shelf. Hurry up!"

      Peter runs to get some bags of rice. They're in another room and they are on the top of the shelf. The shelf

is high up (高). Peter is tall, but he can't reach (够到) the bags. He brings two boxes and puts one box on top of

the other. Then he stands on them. Now he can reach the bags on the shelf.

      The shopkeeper is coming. He is calling Peter.

      "Peter! Hurry up! What are you doing? Where are the bags of rice?" he says, he opens the door. He can't see Peter on the boxes.

      "Don't open the door!" Peter says. Then Peter falls down (跌倒)!

      Now Peter is on the floor. There is some rice on his head.

1. Peter helps the shopkeeper _______. [ ]

A. sell food sometimes

B. carry bags of oranges

C. in a food shop

D. buy some rice today

2. People come to the shop for _______. [ ]

A. the vegetables

B. food

C. the bikes

D. the fruit

3. Peter runs to another room to get some bags of rice because _______.[ ]

A. his father asks him to carry some

B. the shopkeeper wants to cook the meal

C. the shelves are full of rice

D. the shelves for rice are empty

4. The bags are _______. [ ]

A. easy to reach for Peter

B. too high for Peter to reach

C. on top of the boxes

D. very heavy

5. Peter falls down because _______. [ ]

A. he is on the boxes behind the door and the boss pushes the door

B. the bags fall down

C. the shopkeeper is calling him

D. there's some rice on his head

建设工程项目总进度计划是在（）编制的。

A.设计准备阶段

B.设计阶段

C.施工准备阶段

D.施工阶段

下丘脑-神经垂体系统分泌的激素是

A．生长激素和催乳素

B．抗利尿激素和催产素

C．促性腺激素和促黑激素

D．肾上腺素和去甲肾上腺素

E．促甲状腺激素和促肾上腺皮质激素

如图所示，用甲、乙两刻度尺测量同一木块的长度，其测量结果分别为：甲测量的结果是 _____，甲尺的分度值是_____；乙测量的结果是_____，乙尺的分度值是_____，_____尺测量较准确．

对哮喘急性发作无效的药物是

A．沙丁胺醇

B．地塞米松

C．色甘酸钠

D．氨茶碱

E．肾上腺素