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【判断题】
电烙铁的保护接线端可以接线，也可不接线。A.
正确
B.
错误
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【简答题】Practice Problem 16.14 Dihydropyran reacts readily with an alcohol in the presence of a trace of anhydrous HCl or H2SO4 to form a tetrahydropyranyl (THP) ether: 二氢吡喃与醇在无水 HCl 或 H2SO4 催化下能成生四氢吡喃醚 (THP)...
【单选题】使用“()”菜单命令可以对图像的色彩、亮度和对比度进行调整，而“色阶”菜单命令则只能调整图像的暗调、中间调和亮度。
A.
曲线
B.
自动色阶
C.
色彩平衡
D.
色相/饱和度
【单选题】选择“图像/调整/( )”命令可以对图像的色彩、亮度和对比度进行调整,而“图像/调整/色阶”命令则只能调整图像的暗调、中间调和亮度。
A.
曲线
B.
自动色阶
C.
色彩平衡
D.
色相/饱和度
【单选题】I'm very tired and I don't think I feel like ______ shopping today.
A.
to go to
B.
to go
C.
going to
D.
going
【单选题】使用“( )”命令可以对图像的色彩、亮度和对比度进行调整,而“色阶”命令则只能调整图像的暗调、中间调和亮度。
A.
曲线
B.
亮度/对比度
C.
色彩平衡
D.
色相/饱和度
【多选题】How is acetyl groups transfered via shuttle from mitochondria to the cytosol?
A.
The inner mitochondrial membrane is impermeable to acetyl-CoA, so an indirect shuttle transfers acetyl group equivalents across the membrane. Intramitochondrial acetyl-CoA first reacts with oxaloacetate to form citrate, in the citric acid cycle reaction catalyzed by citrate synthase.
B.
Citrate then passes through the inner membrane on the citrate transporter. In the cytosol, citrate cleavage by citrate lyase regenerates acetyl-CoA and oxaloacetate in an ATP-dependent reaction.
C.
Oxaloacetate cannot return to the mitochondrial matrix directly, as there is no oxaloacetate transporter. Instead, cytosolic malate dehydrogenase reduces the oxaloacetate to malate, which can return to the mitochondrial matrix on the malate–α-ketoglutarate transporter, in exchange for citrate.
D.
In the matrix, malate is reoxidized to oxaloacetate to complete the shuttle. However, most of the malate produced in the cytosol is used to generate cytosolic NADPH through the activity of malic enzyme. The pyruvate produced is transported into the mitochondria by the pyruvate transporter, then converted back into oxaloacetate by pyruvate carboxylase in the matrix.
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