【简答题】一个三角形中至少有( )个锐角,最多只有( )个直角或钝角。
【单选题】用同一KMnO4标准溶液分别滴定体积相等的FeSO4和H2C2O4溶液,耗用的标准溶液体积相等,对两溶液浓度关系正确表述是
【单选题】Why does the speaker say this: "I will explain how researchers set up their experiment, what its results were, and what those results can help us conclude about chimpanzees and ourselves"?
A.
to introduce a surprising conclusion
B.
to help listeners understand how she will organize the lecture
C.
to explain that she will discuss facts rather than opinions
D.
to emphasize the behavioral similarities between chimpanzees and humans
【简答题】任意一个三角形中至少有( )个锐角。三角形的内角和是( )度。
【简答题】用同一 KMnO 4 标准溶液分别滴定体积相等的 FeSO 4 和 H 2 C 2 O 4 溶液,耗用的 KMnO 4 标准溶液体积相等,试问 FeSO 4 和 H 2 C 2 O 4 两种溶液浓度的比例关系 为多少?
【单选题】The results can help you stay ___ and alert your doctor to the signs of a medical problem.