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【单选题】
关于移液管的使用,顺序正确的是() 1.移取溶液前,用滤纸将尖端内外的水除去,然后用待移取的溶液将移液管润洗三次,润洗过的溶液应从尖口放出,弃去。 2.先把洗耳球内空气压出,再紧插在移液管上。 3.将管插入液面以下1~2 cm深度,溶液边下移移液管,不能进气泡。 4.溶液全部流出后,再停留15 s ,留在的液体不要吹出。A.
1234
B.
1324
C.
2314
D.
2134
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【简答题】于空白处完整作者游览路线:岱宗坊→( )→( )→一天门→孔子登临处→天阶→红门→经石峪→柏洞→壶天阁→黄岘岭→( )→云步桥→( )→升仙坊→紧十八盘→南天门→( )。
【单选题】I have no idea what ____ while I was asleep.
A.
has happened
B.
was happened
C.
had happened
D.
happened
【单选题】I have no idea what _____ while I was asleep.
A.
has happened
B.
could happen
C.
had happened
D.
happened
【单选题】I have no idea what ( )while I was asleep.
A.
has happened
B.
was happened
C.
had happened
D.
is happened
【简答题】于空白处完整作者游览路线: 岱宗坊 →( ) →( ) → 一天门 → 孔子登临处 → 天 阶 → 红门 → 经石峪 → 柏洞 → 壶天阁 → 黄岘岭 →( ) → 云步桥 →( ) → 升仙坊 → 紧十 八盘 → 南天门 →( ) 。
【单选题】I have no idea what Linda ______ at this time tomorrow.
A.
will be doing
B.
is doing
C.
will do
D.
does
【简答题】I have no idea what to say.
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