皮皮学，免费搜题
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搜题
【单选题】
下列化合物中分子偶极矩为零的是( )A.
BF 3
B.
H 2 S
C.
H 2 O
D.
SO 2
E.
NH 3
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】What does the nurse say are some common causes of heart disease?
A.
high blood pressure
B.
smoking
C.
living alone
D.
high blood sugar
【单选题】What does the nurse require Ella to show?
A.
Prescription.
B.
Medication sheet.
C.
Registration card.
【简答题】What
does the nurse require Ella to show?A. prescription B. medication sheet C. registration card
【单选题】What does the nurse say Tracy should do?
A.
Check her temperature.
B.
Stay in bed.
C.
See a doctor.
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