A
(2020·邯郸二模)Chefs typically toss(抛)the frying food into the air from deep，rounded pans or woks before catching it again.Launching rice and its fixings allows a chef to cook it over really hot flames without burning.At times，temperatures in a pan can reach 1，200 Celsius dagree.__1__
Scientists found that the chefs relied on a specific pattern of motion.And they repeated those motions about three times a second.__2__At the same time the wok was rocked to and fro.The chefs used the edge of the stovetop as a fulcrum(支点)on which to balance as they rocked it.
Cooks use similarly complex patterns of movement to cook up other foods.__3__
Scientists used a computer to simulate(模仿)the tracks of rice that would occur in a wok moved in various ways.Along the way，the scientists hit on some key cooking tips.The rocking and sliding motions shouldn't be done at the same time.__4__Also，the wok's movements should repeat rapidly.Moving the wok even faster could launch the rice higher.That might allow cooking at higher temperatures and perhaps a quicker meal.
__5__Chefs at Chinese restaurants can struggle with shoulder pain，studies have shown.Rapidly shaking their heavy woks could be part of the problem.One solution might be a stirfrying robot.It could be built based on their new found results to take the weight off chefs' shoulders.
A．But faster shaking may be hard on a cook.
B．To make fried rice like a professional，use science.
C．If they are，the rice won't mix well and could burn.
D．Each repetition included sliding a wok back and forth.
E．Cooking is hard work that needs patience and perseverance.
F．The high temperature helps create the tastiest stirfried food.
G．They will turn the pan quickly，for instance，to get smooth，flat egg cakes.
[语篇解读] 这是一篇说明文，科学家对厨师炒菜时向空中抛菜的动作进行了研究，发现了其中的科学道理。
1．解析：根据F选项中的the high temperature可知，F选项与上文提到的高温属于同一话题。
答案：F
2．解析：根据D选项中的关键词repetition可知，D选项与上句中的repeated属于同一话题，顺理成章。
答案：D
3．解析：G选项中的for instance是对上句中use similarly complex patterns的例证。
答案：G
4．解析：根据空处前一句“The rocking and sliding motions shouldn't be done at the same time.”及C选项中的if they are可推断，这个省略句的完整形式是“If they are done at the same time，the rice won't mix well and could burn.”。
答案：C
5．解析：上段提到摇晃炒锅可以炒出好吃的菜。而本段主要讲述厨师的劳累。由此判断上下段之间为转折关系。
答案：A
