皮皮学，免费搜题
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搜题
【单选题】
慢性肺源性心脏病最常见病因是()A.
支气管、肺疾病，慢阻肺
B.
胸廓运动障碍性疾病
C.
肺血管疾病
D.
原发性肺泡通气不足
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】列出SC表中所有考试不及格的学生的学号Sno（无须重复），其SQL语句为（ ）
A.
SELECT DISTINCT Sno FROM SC WHERE Grade<60;< /div>
B.
SELECT DISTINCT Sno FROM SC WHERE Grade IS NULL;
C.
SELECT Sno FROM SC WHERE Grade<60;< /div>
D.
SELECT ALL Sno FROM SC WHERE Grade<60;< /div>
【单选题】You ______ him out though you were very busy.
A.
could have helped
B.
must help
C.
should have helped
D.
ought to help
【单选题】Though they are very busy every day, they manage to get tighter_______.
A.
by and by
B.
now and then
C.
all the time
D.
more or less
【单选题】Though it was very hot, the farmers were busy ______ wheat in the fields.
A.
to get in
B.
to gather in
C.
gathering in
【单选题】Though it is very hot, I am busy writing materials for my students, only ____ once in a while to have some water. [ ]
A.
stopping
B.
to stop
C.
stop
D.
stopped
【简答题】He ____ you more help even though he was very busy . A．might have given B．might give C．may have given D．may give
【单选题】Though the working mother is very busy, she _____ an hour every day to spend with her daughter.
A.
set out
B.
set off
C.
set about
D.
set aside
【单选题】Though the manager is very busy, he still ____ an hour to read every day. [ ]
A.
puts off
B.
sets aside
C.
takes on
D.
comes up
【多选题】下列哪些是生产管理负责人和质量管理负责人共同的职责（ ）
A.
审核和批准产品的工艺规程、操作规程等文件；监督厂区卫生状况
B.
确保关键设备经过确认；确保完成生产工艺验证；确保企业所有相关人员都已经过必要的上岗前培训和继续培训，并根据实际需要调整培训内容
C.
批准并监督委托生产；确定和监控物料和产品的贮存条件；保存记录
D.
监督本规范执行状况；监控影响产品质量的因素
【单选题】Though he is busy, he is very _____ and makes a telephone call to his parents from time to time and tries his best to spare some time to visit them.
A.
constant
B.
considerate
C.
considerable
D.
conscious.
相关题目：
【单选题】列出SC表中所有考试不及格的学生的学号Sno（无须重复），其SQL语句为（ ）
A.
SELECT DISTINCT Sno FROM SC WHERE Grade<60;< /div>
B.
SELECT DISTINCT Sno FROM SC WHERE Grade IS NULL;
C.
SELECT Sno FROM SC WHERE Grade<60;< /div>
D.
SELECT ALL Sno FROM SC WHERE Grade<60;< /div>