<p class="ql-block">what can we see in the display board?</p><p class="ql-block"><br></p> <p class="ql-block">Read and find out the answer</p> <p class="ql-block">read the yellow together</p> <p class="ql-block">How can we show the problems?—-</p> <p class="ql-block">PPT里出现“It’s a big change!”</p> <p class="ql-block">Do you like the title?</p>