根据录音，选择合适的答案（） 查看材料
A. Get a visa．
Buy a plane ticket．
C. Register for classes．
D. Pack his things．
根据录音，选择合适的答案（） 查看材料
A. They can save money on transportation．
B. They will be free to go anywhere．
C. They can take their luggage in car．
D. They can drive all over
根据录音，选择合适的答案（） 查看材料
A week in the bush and a week at the Great Barrier Reef．
B. A week in the bush and a week on the beach．
C. A week on the beach and a week at the Great Barrier Reef．
D. A week in Airs Rock and a week at the Great Barrier Reef．
根据录音，选择合适的答案（） 查看材料
A. Go on working today．
B. Ask for a sick leave．
Change the time of the meeting．
D. Go to hospital at once．
溶酶体的形成过程是()。
A. 多种酸性水解酶由糙面内质网上附着核糖体合成→进入糙面内质网管腔→高尔基复合体浓缩、加工→分离出小泡，再与胞内体结合→初级溶酶体
B. 多种酸性水解酶由游离核糖体合成→进入糙面内质网管腔→高尔基复合体浓缩、加工→分离出小泡，再与胞内体结合→初级溶酶体
C. 多种酸性水解酶由糙面内质网上附着核糖体合成→进入光面内质网管腔→高尔基复合体浓缩、加工→分离出小泡，再与胞内体结合→初级溶酶体
D. 多种酸性水解酶由游离核糖体合成→进入光面内质网管腔→高尔基复合体浓缩、加工→分离出小泡，再与胞内体结合→初级溶酶体
E. 多种酸性水解酶由糙面内质网上附着核糖体合成→进入糙面内质网管腔浓缩、加工→分离出小泡，再与胞内体结合→初级溶酶体
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