位于卵巢皮质、体积小、数量多,在卵细胞周围的卵泡细胞只有一层、呈柱状,指的是()。
A.初级卵泡
B.次级卵泡
C.成熟卵泡
D.原始卵泡
E.以上都不是
参考答案:A
阅读理解。
Wen Feng Store Sale
1. In all goods(物品)_______are the cheapest (最廉价的 ) .
A. bags
B. shoes
C. hats
D. socks
2. Jack wants to buy two pairs of(两双) socks, one bag and two hats. How much are they?
A. Twenty-one yuan.
B. Nineteen yuan.
C. Eighteen dollars.
D. Nineteen dollars.
3. Mary only likes blue, so(因此)she will buy_______.
A. socks and bags
B. T-shirts adn sweaters
C. hats and bags
D. shoes and hats
4. The store has hats in_______.
A. all colors
B. blue and white
C. blue and black
D. white, blue and black
关于实像和虚像。正确的判断是[ ]
A.实像能用光屏得到,虚像不能用光屏得到
B.虚像是人的错觉,并没有光线进入人眼,实像却相反
C.平面镜只能成虚像,凸透镜只能成实像
D.由光的反射成虚像,折射成实像