【简答题】蛋白质的基本组成单位是(),组成人体蛋白质的氨基酸共有()种,氨基酸在蛋白质分子中以()相连接。
【简答题】A.He doesn't have a computer. B.His computer needs to be repaired. C.He can't understand the instructions. D.He has a doctor's degree in computer science.
【单选题】设a=12,且a定义为整型变量。执行语句a+=a-=a*=a;后a的值为()。
【单选题】How can people get across their points without misunderstanding and confusion?
A.
By using the simplest words and sentence structures in communication.
B.
By reducing the frequency of problems in the communicating process.
C.
By making vivid comparisons and giving as many examples as possible.
D.
By providing the listeners as much background information as possible.
【简答题】三视图与物体位置的对应关系,三视图之间的投影关系。
【判断题】氨基酸是蛋白质的基本组成单位。组成蛋白质的氨基酸有廿种,其中八种是人体需要而不能自行合成,必须由食物供给的,称为必需氨基酸。它们为苏氨酸、色氨酸、缬氨酸、赖氨酸、亮氨酸、异亮氨酸、苯丙氨酸及蛋氨酸。
【单选题】Where do people usually get their international driving license?
A.
They obtain it in their home country.
B.
They obtain it while they arrive in Japan.
C.
They obtain it in a third country.
D.
They can buy one instead.