A、Rough endoplasmic reticulum
B、mitochondria
C、Golgi apparatus
D、Smooth endoplasmic reticulum
A、Rough endoplasmic reticulum
B、mitochondria
C、Golgi apparatus
D、Smooth endoplasmic reticulum
A、A stopped organ pipe of length L.
B、A stopped organ pipe of length 2L.
C、An open organ pipe of length L.
D、An open organ pipe of length 2L.
A、to look around casually and randomly, without seeking anything in particular
B、to shop around; not necessarily buying anything
C、to eat lightly, try different dishes
D、None of the above
A、Butterfly disease
B、Acne
C、Port-wine stain
D、Pimple
A、A point at a distance L from a uniformly charged wire with length L.
B、Near the surface of a large uniformly charged plane sheet.
C、Beside a charged disk with radius R.
D、Outside a uniformly charged cube of length L.
A、I am crazy about swimming.
B、I’m interested in swimming.
C、I am excited about swimming.
D、I love swimming.
A、54
B、55
C、56
D、57
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