浆细胞胞质呈嗜碱性是由于：（）。
A.有丰富的粗面内质网
B.高尔基复合体发达
C.线粒体丰富
D.滑面内质网丰富
E.溶酶体丰富
参考答案：A
His poor _____ English prevented him _____.
A．spoken; from understanding
B．spoken; from being understood
C．speaking; from understanding
D．speaking; from being understood
我国现有的两个特别行政区是（ ）
A．北京、天津
B．上海、重庆
C．珠海、深圳
D．香港、澳门
