关于月经周期，下列哪项错误A．两次月经第1日的间隔时间称为月经周期 B．上次月经干净

Menu Sandwiches Chicken           $5.20 Egg               $3.60 Beef              $4.50 Turkey            $6.50 Drinks Yogurt            $2.00 Orange Juice      $1.70 Coke              $ 2.50 Coffee            $ 2.80 Rice Fried             $3.50 With chicken      $4.80 With meat         $ 4.50 Desserts Pizza             $2.50 Banana shakes     $ 3.50 Chocolate         $5.50

小题1:How many kinds of sandwiches?
A. Three.   B. Four.   C. Five.
小题2: What dessert would you like best?
A. Sandwich with egg.    B. Coffee.     C. Chocolate.
小题3: How much is the rice with chicken and a glass of orange juice?
A. $6.50.    B. $4.80.   C. $7.50.