小题1:The people in needn’t go to work on Fridays.

A．Canada

B．Scotland

C．Japan

D．Egypt小题2:If it is 8:00 a.m. in western Canada, the time is _______ in eastern Canada.

A．11:00a.m

B．2:00 p.m.

C．12:30 p.m.

D．4:00 a.m.小题3:While Canadian children are waking up, children in Scotland are ________.

A．having lessons

B．sleeping

C．watching TV

D．playing games

蛋白质合成后经化学修饰的氨基酸是

A．半胱氨酸
B．羟脯氨酸
C．甲硫(蛋)氨酸
D．丝氨酸
E．酪氨酸