将黄色玫瑰的枝条做接穗，红色玫瑰做砧木，进行嫁接，嫁接上去的枝条开的花是黄色的。

如图是一台光学显微镜镜盒里的4个镜头，甲、乙一端无螺纹，甲较长，乙较短；丙、丁有螺纹，丙较长，丁较短．若要在视野内看到较多的细胞和要看到较清晰的细胞结构，宜选用的镜头组合分别是（　　）

A．甲和丙 乙和丁

B．乙和丙  甲和丁

C．甲和丁  乙和丙

D．乙和丁  甲和丙

下列对用效益物权的表述，下列表述不正确的是：

A．用益物权以对物的占有为前题，以对标的物的使用、收益为其主要内容

B．用益物权的客体只能是不动产

C．用益物权的依据只能是民法普通法，而不能是民法特别法

D．用益物权是他物权、限制物权和有期限物权

根据内容用适当的句子补全对话。

A: Hi, Li Hua. Our summer holidays are coming. What are you going to do?

B: 1 _______________________________.

A: Visit Shanghai? For the World Expo in Shanghai.

B: Quite right.

A: You are so lucky! 2 _______________________________?

B: By plane, I know you often go there. Could you tell me something about it?

A: Of course.

B: What's the weather like there?

A: It is very hot. You'd better take a pair of sunglasses and some cool clothes.

B: Thank you for your advice. It's said the World Expo is quite wonderful. Would you like to go with me?

A: I'd love to, But I am afraid I can't. My grandfather is ill. I have to look after him.

B: 3_______________________________. I hope he will be better soon.

A: I hope so. By the way, when are you leaving for Shanghai?

B: Next week.

A: 4_______________________________! Bye-bye

B: Bye.

You have made a few spelling mistakes in your composition, but it is well written _____.[ ]

A. on a whole

B. as a whole

C. general speaking

D. as the whole

苗木猝倒病是真菌引起的。