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【多选题】
已知卵清蛋白pI=4.6,β乳球蛋白pI=5.2,蛋白酶原pI=9.1,上述蛋白质在电场中的移动情况A.
缓冲液pH为7.0时,蛋白酶原向阳极移动,其他两种向阴极移动
B.
缓冲液pH为5.0时,卵清蛋白向阳极移动,其他两种向阴极移动
C.
缓冲液pH为9.1时,蛋白酶原在原地不动,其他两种向阳极移动
D.
缓冲液pH为5.2时,乳球蛋白在原地不动,卵清蛋白向阳极移动,蛋白酶原向阴极移动
E.
缓冲液pH为10时,乳球蛋白,卵清蛋白,蛋白酶原阴极移动
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举一反三
【单选题】Which of the following statements is true?
A.
Every company has strict rules regarding office dress.
B.
You can wear whatever you like if your company doesn't have high standards for dressing.
C.
You should dress according to the business setting even there are no fixed rules.
D.
In companies with relaxed rules on office dress, you can hardly spot a manager among other employees.
【单选题】Daniel Peterson, Trapani's new CEO, has______to hold company-wide meetings every three months.
A.
promise
B.
promises
C.
promised
D.
promising
【单选题】下列各项支出中,应明确计入“制造费用”账户的是( )。
A.
生产车间固定资产折旧费
B.
厂部管理部门固定资产折旧费
C.
生产车间生产工人工资
D.
厂部管理部门管理人员工资
【单选题】The company building she usually worked ______every day has been pulled down for the City Center.
A.
on
B.
in
C.
for
D.
不填
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