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【单选题】
在Excel中,日期数据的类型属于()A.
文本型
B.
时间型
C.
逻辑型
D.
数字型
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举一反三
【单选题】All the following cells derive from the embryonic mesenchymal cells EXCEPT
A.
macrophages
B.
neurons
C.
blood cells
D.
oteoblasts
E.
chondrocytes
【单选题】All the following cells derive from the embryonic mesenchymal cells EXCEPT
A.
macrophages
B.
epidermal cells
C.
blood cells
D.
oteoblasts
E.
chondrocytes
【单选题】Which of the following cells release histamine
A.
Macrophages
B.
adipose cells
C.
Plasma cells
D.
Mast cells
E.
Eosinophils
【单选题】Which of the following cells are totipotent cells?
A.
inner cell mass
B.
skin stem cells
C.
red blood cells
D.
iPSCs
E.
8-cell embryo
【单选题】Which of the following cells line the stomach?
A.
Parietal cells
B.
Mucous neck cells
C.
Surface mucous cells
D.
Absorptive columnar cells
E.
Goblet cells
【单选题】which of the following cells are pluripotent stem cells?
A.
iPSCs
B.
zygote
C.
8-16 cell embryo
D.
skin stem cells
E.
hematopoietic stem cells
【单选题】已知一正弦电压的幅值为10V,初相位为60°,频率为1000 Hz,则电压瞬时值的表达式为________。
A.
u ＝10√2 sin(314t十60°)V
B.
u ＝10 √2 sin(2000πt十60 °)V
C.
u ＝10 sin(314t十60 °)V
D.
u＝10 sin(2000πt十60°)V
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