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【单选题】
《中国药典》(2015年版)规定,三硅酸镁中氯化物检查法:取本品0.50g,加硝酸5mL与水30mL,煮沸,放冷,加水至50mL,摇匀,放置30min,过滤,取滤液10mL,依法检查,与标准氯化钠溶液(1mL相当于10μg的Cl)制成的对照液比较,不得更浓,氯化物的限量是()。A.
0.0005
B.
0.0001
C.
50×10-6
D.
10×10-6
E.
5×10-6
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举一反三
【单选题】My friend John called and ____me to his party just now.
A.
will invite
B.
invited
C.
invites
D.
has invited
【单选题】— Has John arrived? —Yes, already. ________ he wait outside or just come in?
A.
Shall
B.
May
C.
Could
D.
Must
【简答题】总线上连接的各类设备,按其对总线有无控制功能可以分为________ 的___________。
【简答题】总线上连接的各类设备,按其对总线有无控制功能可以分为____和____。
【单选题】听力原文：W: Hello. May I speak to John? M: Sorry, he has just gone to America for a meeting. Where is John now?
A.
America.
B.
China.
C.
Canada.
【单选题】I don't think John saw me. He ____ a book at that moment. [ ]
A.
just read
B.
has just read
C.
was just reading
D.
had just read
【简答题】先找规律,再填一填. 66、67、68、________、________、________.
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