青藏高原单位面积小麦产量高，原因是 （） A．水源充足 B．光照强 C．热量丰富

根据短文内容，从题中所给的A、B、C三个选项中选择正确答案。

     Betty is an American girl. She is thirteen. She is in Beijing with her parents. She doesn't know much

Chinese. She can't speak Chinese well Sometimes her friends don't understand (理解) her. It's Sunday

morning. She's going to the zoo to see the pandas (熊猫). She's waiting at the bus stop (公共汽车站).

At the bus stop she asks a Chinese boy how to go to the zoo. But the boy can't understand her. Then

she takes out a pen and some paper. She draws a panda on it and shows the picture to the boy. The

boy smiles and then shows her the way to the zoo.

1. Betty is in Beijing with her _________.

A. brother      

B. sister          

C. father and mother

2. She can speak _________ Chinese.

A. much  

B. little          

C. any

3. She is going to the zoo _________.

A. by bike        

B. by bus        

C. by train

4. She's going to the zoo to _________.

A. see her friends  

B. see tigers      

C. see pandas

5. The boy _________.

A. shows her the way to the zoo      

B. doesn't know the way

C. goes to the zoo with her

在同温同压下，下列各组热化学方程式Q2＞Q1的是[ ]

A．2H₂(g)＋O₂(g)＝2H₂O(l)；△H＝－Q1　2H₂(g)＋O₂(g)＝2H₂O(g)；△H＝－Q2 　　

B．S(g)＋O₂(g)＝SO₂(g)；△H＝－Q1　S(s)＋O₂(g)＝SO₂(g)；△H＝－Q2 　　

C．　C(s)＋O₂(g)＝CO₂(g)；△H＝－Q2 　　

D．H₂(g)＋Cl₂(g)＝2HCl(g)；△H＝－Q1　

按照额定光通量，LED道路/隧道照明产品可划分为（）、（）、（）和14000lm四种规格。

下列关于烟草商业企业服务营销目标的描述正确的是（）。

A.服务营销最直接的目标是提升客户满意，增强客户黏性

B.把握市场状态，有效调控市场是优质卷烟零售网络的基本要求

C.了解消费信息，有效引导消费是优质卷烟零售网络能力的体现

D.打造优质渠道，促进品牌培育是优质卷烟零售网络能力的最终目标

病原菌检验中可用于分型分析的方法是

A．分离培养
B．直接涂片镜检
C．血清学试验
D．药敏试验
E．生化试验