朱熹编著________,作为小学阶段的教材。
参考答案:《小学》
肌肉中氨基酸脱氨基的主要方式是
A.L-谷氨酸氧化脱氨基作用B.嘌呤核苷酸循环C.联合脱氨基作用D.鸟氨酸循环E.转氨基作用
In our class, when the bell rang and the teacher closed his book, it was a()for everyone to stand up.
A.signal
B.chance
C.mark
D.measure