故形立则章成矣,声发则文生矣。这句话出自刘勰《文心雕龙》。
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1. Going to college, your 1(教育) is also very serious 2.(任务)2. To a large 3(从很大程度上) , you will be 4(依靠自己) .3. You will have to 5 (设立目标) and work hard for them 6(一步步地) until you graduate.4. As a teacher, I always tell my students:7 (充分利用)the opportunities 8 (手头的).You 9 (欠)many people. Please don't let them 10.(让他们失望)Take a course you really like,11 (尊重)yourself and be 12 (诚实) yourself. This is 13 all the people.
大多数药物是按下列哪种机制进入体内的?
A. 易化扩散
B. 简单扩散
C. 主动转运
D. 滤过
E. 入胞
以下哪些属于被动转运?
A.简单扩散
B.滤过
C.易化扩散
D.吞噬
E.胞饮
主动转运具有以下哪些特点?
A.消耗能量
B.膜两侧具有浓度差
C.需要载体
D.具有饱和现象
E.具有竞争性抑制