单项选择题 A train traveling at a speed of 80 mph enters a tunnel that is 0.5 miles long. The length of the train is 0.25 miles. How long does it take for all of the train to pass through the tunnel, from the moment the front enters, to the moment the rear emerges

单项选择题 Which of the following proverbs is closest in meaning to the saying, "Birds of a feather flock together."

单项选择题 This bar chart shows how many times a class of children hit a target with a set of ten beanbags. How many children hit the target fewer than 7 times