【简答题】图形的重心,又称____,它的变化使符号产生动静变化。
【单选题】酶促反应速度达到最大值时对应的温度称为酶的
【简答题】酶促反应速度达到最大时的温度称为( )。动物体内一般酶的此值为( )°C,接近( )。
【单选题】Learner drivers have to keep their previous jobs ______
A.
because they don' t want their present bosses to know what they're doing
B.
because they want to earn money from both jobs
C.
because they cannot earn money as taxi drivers yet
D.
because they look forward to further promotion
【判断题】三代时间管理是目前正流行、讲求优先顺序的挂念,缺点在于可能会因过于死板,个性化、任性化不够。
【单选题】( )的缺点在于可能会因过于死板,个性化、任性化不够。