选词填空。

A. what time  B. What day  C. How many  D. When  E. what

1. —__________ books do you have?

    —I have one.

2. — ________ is it?

    —It's Monday, July first.

3. —______ is National Day?

    —October first.

4. —______ is it?

    —It's six o'clock.

5. —______is this?

    —It's the sun.

甲壳动物的凝集素被认为具有识别“自我”与“非己”能力，（）最有说服力

A.蓝蟹凝集素能够选择性地识别副溶血弧菌10种血清型

B.斑节对虾产生的凝集素可与创伤弧菌发生凝集反应

C.中国对虾注射弧菌100亿个，48h后血淋巴凝集活力较正常虾高8倍

D.半乳糖、甘露糖、L-阿拉伯糖、D-葡萄糖胺、N-乙酰-D-葡萄糖胺对日本对虾血清的凝集活性抑制率在50%以上