细胞中核糖体存在的部位为：（）
A．细胞质基质
B．粗面内质网
C．细胞核外膜
D．溶酶体膜
参考答案：A, B, C
The phenomenon that the earth is becoming warmer has attracted ______ attention.[ ]
A. a huge number of
B. a large sum of
C. a great deal of
D. a great many
急性肾小球肾炎患者尿中可见
A．粗颗粒管型B．红细胞管型C．肾衰竭管型D．脂肪管型E．蜡样管型
