— .
— It's cloudy.
A:How's the weather like today?
B:How's the weather today?
C:What is the weather today?
D:Which is the weather today?
问题一:
问题二:
用显微镜观察血涂片,在同一视野中所见到的数目最多的血细胞是( )
根据课文《大自然的启示》内容,选择正确的答案。
人类从蚊子身上得到启示,最终解决了机翼因剧烈抖动而破碎的现象。
下列粒子结构示意图中表示阴离子的是( )